#!/bin/bash
#
# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -e

function sigterm_handler() {
    echo "SIGTERM signal received, try to gracefully shutdown all services..."
    gitlab-ctl stop
}

function failed_pg_upgrade() {
    echo 'Upgrading the existing database failed and was reverted.'
    echo 'Please check the output, and open an issue at:'
    echo 'https://gitlab.com/gitlab-org/omnibus-gitlab/issues'
    echo 'If you would like to restart the instance without attempting to'
    echo 'upgrade, add the following to your docker command:'
    echo '-e GITLAB_SKIP_PG_UPGRADE=true'
    exit 1
}

function clean_stale_pids() {
    # cleanup known pid/socket files
    for x in /opt/gitlab/sv /run $(ls -d /tmp/gitaly-ruby* 2>/dev/null) ; do
        # find
        #  - any (s)ocket or regular (f)ile
        #  - by the name of "*.pid" or "socket.?"
        #  - and delete them
        find $x \
            \( \
              -type f \
              -o -type s \
            \) \(\
              -name pid \
              -o -name "*.pid" \
              -o -name "socket.?" \
            \) \
            -delete ;
    done
}

function detect_unclean_start() {
    set +e
    echo "Cleaning stale PIDs & sockets"
    clean_stale_pids
    set -e
}

trap "sigterm_handler; exit" TERM

source /RELEASE
echo "Thank you for using GitLab Docker Image!"
echo "Current version: $RELEASE_PACKAGE=$RELEASE_VERSION"
echo ""
if [[ "$PACKAGECLOUD_REPO" == "unstable" ]]; then
    echo "You are using UNSTABLE version of $RELEASE_PACKAGE!"
    echo ""
fi
echo "Configure GitLab for your system by editing /etc/gitlab/gitlab.rb file"
echo "And restart this container to reload settings."
echo "To do it use docker exec:"
echo
echo "  docker exec -it gitlab vim /etc/gitlab/gitlab.rb"
echo "  docker restart gitlab"
echo
echo "For a comprehensive list of configuration options please see the Omnibus GitLab readme"
echo "https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/README.md"
echo
echo "If this container fails to start due to permission problems try to fix it by executing:"
echo
echo "  docker exec -it gitlab update-permissions"
echo "  docker restart gitlab"
echo
sleep 3s

# Run unclean start detection & cleanup
detect_unclean_start

# Copy gitlab.rb for the first time
if [[ ! -e /etc/gitlab/gitlab.rb ]]; then
    echo "Installing gitlab.rb config..."
    cp /opt/gitlab/etc/gitlab.rb.template /etc/gitlab/gitlab.rb
    chmod 0600 /etc/gitlab/gitlab.rb
fi

# Generate ssh host key for the first time
if [[ ! -f /etc/gitlab/ssh_host_rsa_key ]]; then
    echo "Generating ssh_host_rsa_key..."
    ssh-keygen -f /etc/gitlab/ssh_host_rsa_key -N '' -t rsa
    chmod 0600 /etc/gitlab/ssh_host_rsa_key
fi
if [[ ! -f /etc/gitlab/ssh_host_ecdsa_key ]]; then
    echo "Generating ssh_host_ecdsa_key..."
    ssh-keygen -f /etc/gitlab/ssh_host_ecdsa_key -N '' -t ecdsa
    chmod 0600 /etc/gitlab/ssh_host_ecdsa_key
fi
if [[ ! -f /etc/gitlab/ssh_host_ed25519_key ]]; then
    echo "Generating ssh_host_ed25519_key..."
    ssh-keygen -f /etc/gitlab/ssh_host_ed25519_key -N '' -t ed25519
    chmod 0600 /etc/gitlab/ssh_host_ed25519_key
fi

# Remove all services, the reconfigure will create them
echo "Preparing services..."
rm -f /opt/gitlab/service/*
ln -s /opt/gitlab/sv/sshd /opt/gitlab/service
ln -sf /opt/gitlab/embedded/bin/sv /opt/gitlab/init/sshd
mkdir -p /var/run/sshd
mkdir -p /var/log/gitlab/sshd
mkdir -p /var/log/gitlab/reconfigure

# Start service manager
echo "Starting services..."
GITLAB_OMNIBUS_CONFIG= /opt/gitlab/embedded/bin/runsvdir-start &

echo "Configuring GitLab..."
gitlab-ctl reconfigure

# Make sure PostgreSQL is at the latest version.
# If it fails, print a message with a workaround and exit
if [ "${GITLAB_SKIP_PG_UPGRADE}" != true ]; then
    gitlab-ctl pg-upgrade -w || failed_pg_upgrade
fi

gitlab-ctl reset-grafana

if [ -n "${GITLAB_POST_RECONFIGURE_SCRIPT+x}" ]; then
  echo "Running Post Reconfigure Script..."
  eval "${GITLAB_POST_RECONFIGURE_SCRIPT}"
fi

# Tail all logs
gitlab-ctl tail &

# Wait for SIGTERM
wait
